Mercenary (5e Subclass)

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Fighter
Mercenaries are specialists trained in ranged combat who use their skills to efficiently eliminate targets.

Successive shots

When you choose this subclass at 3rd level, If you succeed on a ranged attack made against a creature that was already below max health, you may make a second ranged attack against it. If you are wielding a weapon with the loading property, you may use a bonus action to reload between these two attacks. You score a critical hit on attack rolls from 19-20.

Improved critical

Starting at 7th level, you score a critical hit for ranged attacks on rolls from 18-20. Roll an extra damage die on critical.

Ranged skill

Starting at 10th level, when you hit a target with a ranged attack, you may use a bonus action to deal an additional 1d8 damage. Additionally, your proficiency bonus is doubled for any attack roll you make that uses a ranged weapon you're proficient with.

Headshots only

Starting at 15th level, when making a ranged attack, you may choose to have disadvantage to hit, but deal an additional 4d8 damage. You may use this a number of times equal to half your fighter level rounded down, regaining all usages whenever you take a short or long rest.

Suppressive ability

Starting at 18th level, any time you make a successful ranged attack against a creature of large or smaller size, it must succeed on a strength saving throw with a DC of 10 + your proficiency bonus + your Dexterity modifier or be pushed 10 feet and knocked prone.